Added a check to see if AWS credentials can be found in config (not whether they are valid), as opposed to just checking for env vars, before printing the warning that "AWS environment variables are not set"
Linked Issues
Fixes #850
Checklist
[x] I have performed a self-review of my code
[x] I have added appropriate tests
[x] I have updated the Defang CLI docs and/or README to reflect my changes, if necessary
Description
Added a check to see if AWS credentials can be found in config (not whether they are valid), as opposed to just checking for env vars, before printing the warning that "AWS environment variables are not set"
Linked Issues
Fixes #850
Checklist